During the Q&A last night at a Commonwealth Club of California event with questions by Michael Moritz, Managing Partner, Sequoia Capital, Moritz asked Bernanke why, as Fed chairman, he used the pseudonym Edward Quince in his email correspondence,

Bernanke defended the use by saying that he did not want to be inundated with emails.

He said the president also used a pseudonym.

He then went on to say publicly to the crowd of 1,200, "I'm not sure she would want me to reveal this but to Janet Yellen's credit she uses the email janet.yellen@frb.gov."

(Note: It's possible Bernanke said .org instead of ,gov, He said it fast, but I believe it would be .gov)